3a9f472161
Related: #4333 #4421 #5128 Motivation: slice(), duplicate() and readSlice() currently create a non-recyclable derived buffer instance. Under heavy load, an application that creates a lot of derived buffers can put the garbage collector under pressure. Modifications: - Add the following methods which creates a non-recyclable derived buffer - retainedSlice() - retainedDuplicate() - readRetainedSlice() - Add the new recyclable derived buffer implementations, which has its own reference count value - Add ByteBufHolder.retainedDuplicate() - Add ByteBufHolder.replace(ByteBuf) so that.. - a user can replace the content of the holder in a consistent way - copy/duplicate/retainedDuplicate() can delegate the holder construction to replace(ByteBuf) - Use retainedDuplicate() and retainedSlice() wherever possible - Miscellaneous: - Rename DuplicateByteBufTest to DuplicatedByteBufTest (missing 'D') - Make ReplayingDecoderByteBuf.reject() return an exception instead of throwing it so that its callers don't need to add dummy return statement Result: Derived buffers are now recycled when created via retainedSlice() and retainedDuplicate() and derived from a pooled buffer
162 lines
4.1 KiB
Java
162 lines
4.1 KiB
Java
/*
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* Copyright 2013 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.spdy;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.Unpooled;
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import io.netty.util.IllegalReferenceCountException;
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import io.netty.util.internal.StringUtil;
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/**
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* The default {@link SpdyDataFrame} implementation.
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*/
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public class DefaultSpdyDataFrame extends DefaultSpdyStreamFrame implements SpdyDataFrame {
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private final ByteBuf data;
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/**
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* Creates a new instance.
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*
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* @param streamId the Stream-ID of this frame
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*/
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public DefaultSpdyDataFrame(int streamId) {
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this(streamId, Unpooled.buffer(0));
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}
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/**
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* Creates a new instance.
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*
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* @param streamId the Stream-ID of this frame
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* @param data the payload of the frame. Can not exceed {@link SpdyCodecUtil#SPDY_MAX_LENGTH}
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*/
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public DefaultSpdyDataFrame(int streamId, ByteBuf data) {
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super(streamId);
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if (data == null) {
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throw new NullPointerException("data");
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}
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this.data = validate(data);
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}
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private static ByteBuf validate(ByteBuf data) {
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if (data.readableBytes() > SpdyCodecUtil.SPDY_MAX_LENGTH) {
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throw new IllegalArgumentException("data payload cannot exceed "
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+ SpdyCodecUtil.SPDY_MAX_LENGTH + " bytes");
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}
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return data;
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}
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@Override
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public SpdyDataFrame setStreamId(int streamId) {
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super.setStreamId(streamId);
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return this;
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}
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@Override
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public SpdyDataFrame setLast(boolean last) {
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super.setLast(last);
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return this;
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}
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@Override
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public ByteBuf content() {
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if (data.refCnt() <= 0) {
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throw new IllegalReferenceCountException(data.refCnt());
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}
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return data;
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}
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@Override
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public SpdyDataFrame copy() {
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return replace(content().copy());
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}
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@Override
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public SpdyDataFrame duplicate() {
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return replace(content().duplicate());
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}
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@Override
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public SpdyDataFrame retainedDuplicate() {
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return replace(content().retainedDuplicate());
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}
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@Override
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public SpdyDataFrame replace(ByteBuf content) {
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SpdyDataFrame frame = new DefaultSpdyDataFrame(streamId(), content);
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frame.setLast(isLast());
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return frame;
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}
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@Override
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public int refCnt() {
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return data.refCnt();
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}
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@Override
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public SpdyDataFrame retain() {
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data.retain();
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return this;
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}
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@Override
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public SpdyDataFrame retain(int increment) {
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data.retain(increment);
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return this;
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}
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@Override
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public SpdyDataFrame touch() {
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data.touch();
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return this;
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}
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@Override
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public SpdyDataFrame touch(Object hint) {
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data.touch(hint);
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return this;
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}
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@Override
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public boolean release() {
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return data.release();
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}
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@Override
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public boolean release(int decrement) {
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return data.release(decrement);
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}
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@Override
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public String toString() {
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StringBuilder buf = new StringBuilder()
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.append(StringUtil.simpleClassName(this))
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.append("(last: ")
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.append(isLast())
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.append(')')
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.append(StringUtil.NEWLINE)
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.append("--> Stream-ID = ")
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.append(streamId())
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.append(StringUtil.NEWLINE)
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.append("--> Size = ");
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if (refCnt() == 0) {
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buf.append("(freed)");
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} else {
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buf.append(content().readableBytes());
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}
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return buf.toString();
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}
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}
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